Theoretical study of a W-band-covering frequency tunable gyrotron

Fanhong Li, Chao-hai Du, Zi-chao Gao, Shi Pan, Liang Zhang, Pu-kun Liu, K. Ronald, Adrian W. Cross

Research output: Contribution to journalArticle

Abstract

The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and in magnetic resonance spectroscopy. In this paper, we propose a W-band gyrotron which uses a so-called multi-mode switching scheme to realize ultra-broadband frequency tuning capability, nearly covering about 70% of the W-band (75GHz to 110GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multi-mode switching gyrotron is presented. Theoretical study shows that the multi-mode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit a tuning range of about 25 GHz in the W-band is obtainable. The proposed multi-mode switching gyrotron is a promising ultra-broadband source for millimeterwave and terahertz-wave applications.
LanguageEnglish
Pages1-8
Number of pages8
JournalIEEE Transactions on Electron Devices
Publication statusAccepted/In press - 28 Nov 2019

Fingerprint

Tuning
Magnetic resonance spectroscopy
Plasma heating
Terahertz waves
Networks (circuits)
Electromagnetic waves
Fusion reactions

Keywords

  • frequency tunable gyrotron
  • W-band
  • coherent electromagnetic (EM) radiation
  • broadband tuning

Cite this

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title = "Theoretical study of a W-band-covering frequency tunable gyrotron",
abstract = "The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and in magnetic resonance spectroscopy. In this paper, we propose a W-band gyrotron which uses a so-called multi-mode switching scheme to realize ultra-broadband frequency tuning capability, nearly covering about 70{\%} of the W-band (75GHz to 110GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multi-mode switching gyrotron is presented. Theoretical study shows that the multi-mode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit a tuning range of about 25 GHz in the W-band is obtainable. The proposed multi-mode switching gyrotron is a promising ultra-broadband source for millimeterwave and terahertz-wave applications.",
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Theoretical study of a W-band-covering frequency tunable gyrotron. / Li, Fanhong; Du, Chao-hai; Gao, Zi-chao; Pan, Shi; Zhang, Liang; Liu, Pu-kun; Ronald, K.; Cross, Adrian W.

In: IEEE Transactions on Electron Devices, 28.11.2019, p. 1-8.

Research output: Contribution to journalArticle

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AU - Li, Fanhong

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AU - Zhang, Liang

AU - Liu, Pu-kun

AU - Ronald, K.

AU - Cross, Adrian W.

N1 - © © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”

PY - 2019/11/28

Y1 - 2019/11/28

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